CVE-2026-123563
Received Received - Intake

ArrayBuffer Reviver Validation Bypass in Devalue

Publication date: 2026-11-08

Last updated on: 2026-11-08

Assigner: VulnCheck

Description
Devalue before 5.9.3 contains a validation bypass vulnerability that allows custom ArrayBuffer revivers to skip typed-array allocation checks in the parse function. Attackers can supply very small crafted input processed by a malformed ArrayBuffer reviver to allocate massive ArrayBuffers, causing memory exhaustion and denial of service.

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Meta Information

Published
2026-11-08
Last Modified
2026-11-08
Generated
2026-11-08
AI Q&A
2026-11-08
EPSS Evaluated
N/A
NVD
CVE-2026-123563
EUVD
EUVD-2026-119448

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
devalue devalue to 5.9.3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-789 The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

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Executive Summary

This vulnerability is a validation bypass in Devalue versions before 5.9.3. It allows custom ArrayBuffer revivers to skip allocation checks during parsing. Attackers can craft small inputs that trigger massive ArrayBuffer allocations, leading to memory exhaustion and denial of service.

Impact Analysis

An attacker could exploit this to crash applications or services using Devalue by causing excessive memory consumption. This may lead to system slowdowns, unresponsiveness, or complete service outages, depending on the affected software.

Mitigation Strategies

Update devalue to version 5.9.3 or later to address the validation bypass vulnerability. If immediate update is not possible, restrict access to untrusted input processing or disable custom ArrayBuffer revivers in affected applications.

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